Inside Trail Racing - Ultramarathon, Half Marathon & 10K Trail Runs Throughout the SF Bay Area

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Inside Trail Racing - Ultramarathon, Half Marathon & 10K Trail Runs Throughout the SF Bay Area

With trail runs ranging from 5K to 100K, Inside Trail Racing events are family-friendly, and always have a fun, welcoming, and well-supported atmosphere. ITR is dedicated to arranging community focused, gratifying races that unite runners of all strengths and backgrounds. Run with us!